An intense, behind-the-scenes battle is underway as Massachusetts Republicans gear up to select delegates to the National Republican Convention.

The possibility that Republican front-runner Donald Trump will fail to win the nomination on a first ballot has the two remaining GOP presidential hopefuls — Texas Sen. Ted Cruz and Ohio Gov. John Kasich — scrambling to line up delegates who would support them on a second vote.

On Saturday, Republicans will scatter across Massachusetts to elect 27 of the state's 42 GOP delegates — three each in caucuses held in the state's nine congressional districts.

The Trump campaign has already released a slate of 27 delegates and 27 alternates.

The Kasich campaign is also drafting a slate of delegates.

Gov. Charlie Baker, the state's top Republican, won't be attending.